/**
 * Software License, Version 1.0
 * 
 * Copyright 2003 The Trustees of Indiana University.  All rights reserved.
 * 
 *
 *Redistribution and use in source and binary forms, with or without 
 *modification, are permitted provided that the following conditions are met:
 *
 *1) All redistributions of source code must retain the above copyright notice,
 * the list of authors in the original source code, this list of conditions and
 * the disclaimer listed in this license;
 *2) All redistributions in binary form must reproduce the above copyright 
 * notice, this list of conditions and the disclaimer listed in this license in
 * the documentation and/or other materials provided with the distribution;
 *3) Any documentation included with all redistributions must include the 
 * following acknowledgement:
 *
 *"This product includes software developed by the Community Grids Lab. For 
 * further information contact the Community Grids Lab at 
 * http://communitygrids.iu.edu/."
 *
 * Alternatively, this acknowledgement may appear in the software itself, and 
 * wherever such third-party acknowledgments normally appear.
 * 
 *4) The name Indiana University or Community Grids Lab or NaradaBrokering, 
 * shall not be used to endorse or promote products derived from this software 
 * without prior written permission from Indiana University.  For written 
 * permission, please contact the Advanced Research and Technology Institute 
 * ("ARTI") at 351 West 10th Street, Indianapolis, Indiana 46202.
 *5) Products derived from this software may not be called NaradaBrokering, 
 * nor may Indiana University or Community Grids Lab or NaradaBrokering appear
 * in their name, without prior written permission of ARTI.
 * 
 *
 * Indiana University provides no reassurances that the source code provided 
 * does not infringe the patent or any other intellectual property rights of 
 * any other entity.  Indiana University disclaims any liability to any 
 * recipient for claims brought by any other entity based on infringement of 
 * intellectual property rights or otherwise.  
 *
 *LICENSEE UNDERSTANDS THAT SOFTWARE IS PROVIDED "AS IS" FOR WHICH NO 
 *WARRANTIES AS TO CAPABILITIES OR ACCURACY ARE MADE. INDIANA UNIVERSITY GIVES
 *NO WARRANTIES AND MAKES NO REPRESENTATION THAT SOFTWARE IS FREE OF 
 *INFRINGEMENT OF THIRD PARTY PATENT, COPYRIGHT, OR OTHER PROPRIETARY RIGHTS. 
 *INDIANA UNIVERSITY MAKES NO WARRANTIES THAT SOFTWARE IS FREE FROM "BUGS", 
 *"VIRUSES", "TROJAN HORSES", "TRAP DOORS", "WORMS", OR OTHER HARMFUL CODE.  
 *LICENSEE ASSUMES THE ENTIRE RISK AS TO THE PERFORMANCE OF SOFTWARE AND/OR 
 *ASSOCIATED MATERIALS, AND TO THE PERFORMANCE AND VALIDITY OF INFORMATION 
 *GENERATED USING SOFTWARE.
 */
package cgl.narada.wsinfra.deployment.axis.wsrm.handler;

import java.util.StringTokenizer;

import javax.xml.soap.SOAPEnvelope;
import javax.xml.soap.SOAPMessage;

import org.apache.axis.AxisFault;
import org.apache.axis.Message;
import org.apache.axis.MessageContext;

import cgl.narada.wsinfra.WsMessageFlow;
import cgl.narada.wsinfra.deployment.SOAPContext;
import cgl.narada.wsinfra.deployment.axis.WsInfraAxisHandler;
import cgl.narada.wsinfra.deployment.axis.wsrm.WsrmServiceParameters;
import cgl.narada.wsinfra.deployment.impl.SOAPContextImpl;
import cgl.narada.wsinfra.exception.IncorrectExchangeException;
import cgl.narada.wsinfra.exception.MessageFlowException;
import cgl.narada.wsinfra.exception.ProcessingException;
import cgl.narada.wsinfra.exception.UnknownExchangeException;
import cgl.narada.wsinfra.schemas.addressing.EndpointReferenceType;
import cgl.narada.wsinfra.wsa.WsaEprCreator;
import cgl.narada.wsinfra.wsa.WsaProcessingFactory;
import cgl.narada.wsinfra.wsrm.impl.WsrmNodeFactoryImpl;
import cgl.narada.wsinfra.wsrm.impl.WsrmSourceNode;


/**
 * WsrmSourceResponseHandler handles the messages that are received from
 * response chain. The message which is wanted to send reliably reaches this
 * handler. This handler starts required precedures.
 *
 * @author Beytullah Yildiz
 * $Date: 2005/07/29 22:49:21 $
 * $Revision: 1.1 $
*/



public class WsrmSourceResponseHandler
    extends WsInfraAxisHandler {

  private final String identifier = "WsrmSourceHandler";
  private String moduleName = "WsrmSourceResponseAxis: ";
  private WsaEprCreator eprCreator;
  private static WsrmSourceNode wsrmSourceNode;
  private EndpointReferenceType endpointRef;

  public WsrmSourceResponseHandler() {
    this.initilize();

  }
  /**
   * initilize required intences for Source handler.
   */
  public void initilize() {
    try {

      String configInfo = WsrmServiceParameters.getConfigFile();
      String address = WsrmServiceParameters.getFromAddress();
      String methodName = WsrmServiceParameters.getServiceMethodName();
      String handlerClassNames = WsrmServiceParameters.getHandlerChain();

      eprCreator = WsaProcessingFactory.getWsaEprCreator();
      endpointRef = eprCreator.createEpr(address);
      WsrmNodeFactoryImpl wsrmNodeFactoryImpl = WsrmNodeFactoryImpl.getInstance();

      if (wsrmSourceNode == null) {
        wsrmSourceNode = wsrmNodeFactoryImpl.getWsrmSourceNode(configInfo);
        wsrmSourceNode.setMessageFlow(this);
        wsrmSourceNode.setEndpointReference(endpointRef);
      }

      setIdentifier(identifier);

      this.setSoapActionURI(methodName);
      this.initilizeInfraAxisHandler();

      addResponseHandlerChain(handlerClassNames);

    }
    catch (Exception e) {
      System.out.println(e);

    }

  }
  /**
   * Creates hadler objects by given class names and add them into chain of
   * handler.
   */
  private void addResponseHandlerChain(String classNames) {

    StringTokenizer classNameTokenizer = new StringTokenizer(classNames, ",");

    while (classNameTokenizer.hasMoreTokens()) {

      String className = classNameTokenizer.nextToken();
      org.apache.axis.handlers.BasicHandler handler =
          (org.apache.axis.handlers.BasicHandler) createObject(className);
      this.addHandler(handler);

    }
  }

  /**
   * Creates object for a handler class. It takes class name and return
   * an Object
   */

  private Object createObject(String className) {
    Object object = null;
    try {
      Class classDefinition = Class.forName(className);
      object = classDefinition.newInstance();
    }
    catch (Exception e) {
      System.out.println(e);
    }

    return object;
  }

  /** This method returns a boolean which indicates whether further
    processing should continue or if it should stop. A return value of
    <i>true</i> indicates that processing should continue; while <i>false</i>
    indicates that processing should stop. */

  private boolean
      processMessage(SOAPContext soapContext, int direction) throws
      UnknownExchangeException, IncorrectExchangeException,
      MessageFlowException, ProcessingException {
    String from = "the APPLICATION.";
    if (direction == WsMessageFlow.FROM_NETWORK) {
      from = "the Network.";
    }

    System.out.println(moduleName + "Processing SOAP Context received from " +
                       from);

    boolean continueOperations =
        wsrmSourceNode.processExchange(soapContext, direction);

    return continueOperations;
  }

  public void invoke(MessageContext msgContext) throws AxisFault {



    try {


      Message resMessage = msgContext.getResponseMessage();
      SOAPEnvelope res = resMessage.getSOAPEnvelope();

      String receivedSOAPMessage = res.toString();

      if ( (receivedSOAPMessage.indexOf(
          WsrmServiceParameters.getApplicationMessage()) != -1) ||
          (receivedSOAPMessage.indexOf(
          WsrmServiceParameters.getResponseMessage()) != -1)) {

        SOAPMessage soapMessage = cgl.narada.wsinfra.util.SoapMarshaller.
            unmarshallSoapMessage(receivedSOAPMessage.getBytes());
        SOAPContextImpl soapContext = new SOAPContextImpl(soapMessage);

        boolean isProcessed = processMessage(soapContext,
                                             WsMessageFlow.FROM_APPLICATION);

        if (isProcessed) {
          enrouteToNetwork(soapContext.getSOAPMessage());
        }

      }
    }
    catch (Exception e) {
      System.out.println(moduleName + e);

    }

  }

}